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Large keel 1
Large keel 2
Large keel 3
Large keel 4
Large keel 1
Large keel 2
Large keel 3
Large keel 4

Large keel

The main channel plays a core load-bearing role in the ceiling structure and is usually located at the top of the ceiling system. Its main responsibility is to bear the weight of the entire ceiling system, including the weight of ceiling panels (such as gypsum boards, mineral wool boards, etc.) and possibly attached equipment like lamps and air vents, and evenly distribute this weight to the building's structural system (such as beams, columns, etc.). At the same time, it provides a stable force-bearing support surface for the installation of secondary keels (auxiliary keels). By connecting with secondary keels, it jointly constructs a complete ceiling frame structure, ensuring the stability and safety of the ceiling system. When installing various types of ceiling, the main channel is an indispensable key component, widely used in the ceiling construction of residential buildings, commercial places (such as shopping malls, office buildings, hotels), industrial factories, and public buildings (such as schools, hospitals, libraries).
  • Classification
  • By material: Galvanized steel keel (the most common, mostly using high-quality continuous hot-dip galvanized steel strips as raw materials); aluminum alloy main channels are used in some special scenarios.
  • By structural use: Ceiling load-bearing keel
  • By application scenario: Keel for building ceiling systems

Specifications

  • Materials: Galvanized steel (made from high-quality hot-dip galvanized steel strip with over 110g of zinc, offering corrosion resistance, high strength, and extended keel life); Aluminum alloy (high strength, lightweight, and weather-resistant, suitable for weight-sensitive applications or outdoor applications).

 

  • Processing: Cold-formed (molded at room temperature to ensure accurate keel dimensions, a smooth surface, and enhanced mechanical properties). Surface treatment: Hot-dip galvanizing for galvanized steel enhances rust resistance and aesthetics; anodizing and spray-coating for aluminum alloy enhance corrosion resistance and decorative effects.

 

  • Specifications:
  • Common specification examples (galvanized steel main channel):
Model Width (mm) Height (mm) Thickness (mm) Length (m)
MC38×12 38 12 0.8 – 1.2 3 – 6 (customizable)
MC50×15 50 15 0.8 – 1.2 3 – 6 (customizable)
MC60×27 60 27 0.8 – 1.2 3 – 6 (customizable)
  • Specification range: The thickness is usually in the range of 0.5 – 1.2mm, the common widths are 38mm, 50mm, 60mm, etc., the height ranges from 10mm to 30mm, and the conventional lengths are 3m, 4m, 6m, which can also be customized according to actual engineering needs.

 

  • Performance:
  • Load-bearing performance: It has excellent load-bearing capacity and can stably bear the weight of the ceiling system and additional loads. For example, the standard 38 main channel, under reasonable spacing and installation specifications, can bear the weight of gypsum boards and related accessories in a certain area, ensuring that the ceiling structure does not have obvious deformation or collapse during long-term use.

 

  • Stability: Through reasonable structural design and reliable connection with the building structure, the main channel can effectively disperse gravity, ensuring the overall stability of the ceiling system. It connects closely with secondary keels and works together to maintain the flatness and stability of the ceiling.

 

  • Fire resistance: Galvanized steel main channels are non-combustible and have good fire resistance, which can maintain structural integrity in case of fire, buying time for personnel evacuation and fire rescue. Aluminum alloy main channels can also meet certain fire rating requirements after special treatment.

 

  • Waterproof and rust-proof performance: The hot-dip galvanized layer of galvanized steel main channels can effectively prevent water and oxygen from contacting the steel, having excellent waterproof and rust-proof capabilities, and can be used normally even in humid environments (such as bathroom and kitchen ceilings). Due to its material characteristics and surface treatment process, aluminum alloy main channels also have good waterproof and rust-proof performance.

 

Application scenarios:

  • Residential ceiling: Ceiling decoration of indoor spaces such as living rooms, bedrooms, kitchens, and bathrooms, providing stable support and meeting the needs of different decoration styles for ceiling shapes and functions.

 

  • Commercial place ceiling: Commercial areas such as shopping malls, supermarkets, office buildings, hotel lobbies, and restaurants need to bear the weight of heavy ceiling lamps, air conditioning vents and other equipment. The main channel, with its high strength and stability, ensures the safety and reliability of the ceiling, and provides a foundation for creating beautiful and atmospheric commercial spaces.

 

  • Industrial factory ceiling: Used for ceiling construction inside industrial factories, adapting to the particularity of the industrial environment, such as bearing certain vibrations and meeting fire and explosion-proof requirements, ensuring the normal use and safety of the internal space of the factory.

 

  • Public building ceiling: Public buildings such as school classrooms, hospital wards, libraries, and exhibition halls have high requirements for the safety, fire resistance, and environmental protection of the ceiling. The main channel can meet these strict standards and provide a reliable ceiling support structure for public spaces.

 

  • Other features:
  • Easy installation: The main channel is reasonably designed, easy to install and operate, and the connection method with secondary keels and other accessories is simple and efficient, which can greatly shorten the construction period and reduce labor costs.

 

  • Adjustability: Some main channel products have the design feature of adjustable height or length, which can adapt to the height differences and complex structures of different building spaces, enhancing their applicability in actual projects.

 

  • Recyclable: Galvanized steel and aluminum alloy main channels can be recycled and reprocessed after building demolition, conforming to the concept of green environmental protection and reducing the overall cost of building materials.

 

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